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Paris +

Paris +. David Jenkins. Overview. Silicon photomultipliers Reminder of what they are and how they work Testing carried out at York Concept for neutron detector readout Veto box What it is How it could be used for 2n/3n studies PARIS Overview Present status Possible synergies with NEDA.

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Paris +

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  1. Paris + David Jenkins

  2. Overview • Silicon photomultipliers • Reminder of what they are and how they work • Testing carried out at York • Concept for neutron detector readout • Veto box • What it is • How it could be used for 2n/3n studies • PARIS • Overview • Present status • Possible synergies with NEDA

  3. SiPMs

  4. Silicon photomultipliers • Direct replacement for photomultiplier tube • Insensitive to magnetic fields • Can operate in vacuum • Large sizes possible • Attractive for simultaneous PET and MRI scanning • Gain stabilisation as function of temperature must be achieved • Dark current is very high

  5. SPMPlus

  6. SiPM array tested at York – independent read-out of each of 16 segments

  7. Wavelength-shifting plastic e.g. Eljen EJ-280

  8. Veto box

  9. One segment of the “veto” box

  10. PARIS

  11. Goal of the PARIS Collaboration: Design and build high efficiency detector consisting of two shells for medium resolution spectroscopy and calorimetry of g-rays in large energy range Inner(hemi-)sphere, highly granular, will be made of new crystals (LaBr3(Ce), LaCl3, CeZnTe), rather short (up to 5 cm). The readout might be performed with APDs or with digital electronics which would offer the possibility of pulse shape analysis. The inner-sphere will be used as a multiplicity filter of high resolution, sum-energy detector (calorimeter), detector for the gamma-transition up 10 MeV with relatively good resolution (better than 3%), and as an absorber for the large detectors behind. It will serve also for fast timing application. Outer (hemi-)sphere, with lower granularity but with high volume detectors, rather long( at least 15 cm), could be made from conventional crystals (BaF2 or CsI), or using existing detectors (Chateau de Crystal or HECTOR). The outer-sphere will measure high-energy photons or serve as an active shield for the inner one.

  12. The PARIS collaboration (status on 8.5.2008) IFJ PAN Kraków (Poland): P. Bednarczyk, M. Kmiecik, B. Fornal, J. Grębosz, A. Maj, W. Męczynski, K. Mazurek, S. Myalski, J. Styczeń, M. Ziębliński, M. Ciemała, A. Czermak. R. WolskiIPN Orsay (France): F. Azaiez, J.A. Scarpaci, S. Franchoo. I. StefanCSNSM Orsay (France): G. Georgiev, A.Lefebvre-SchuhlUniversity of York (UK): D.G. Jenkins, M.A. Bentley, B.R . Fulton, R. Wadsworth, O. RobertsIPN Lyon (France): Ch. Schmidt, O. Stezowski, N. RedonIPHC Strasbourg (France): O. Dorvaux, S. Courtin, C. Beck, D. Curien, B. Gall, F. Haas, D. Lebhertz, M. Rousseau, M.-D. Salsac, L. Stuttgé, J. DudekGANIL Caen (France): J.P. Wieleczko, S. Grevy, A. Chbihi, G. Verde, J. Frankland, M. Płoszajczak, A. Navin, G. De France, M. LewitowiczLPC-ENSI Caen (France): O. Lopez, E. VientWarsaw University (Poland): M. Kicińska-Habior, J. Srebrny, M. Palacz, P. NapiórkowskiIPJ Swierk, Otwock (Poland): M. MoszyńskiBARC Mumbai (India): D.R. Chakrabarty, V.M. Datar, S. Kumar, E.T. Mirgule, A. Mitra, P.C. RoutTIFR Mumbai (India): I. Mazumdar, V. Nanal, R.G. PillayUniversity of Delhi, New Delhi (India): S.K. MandalUniversity of Surrey, Guildford (UK): Z. Podolyak, P.R. Regan, P. StevensonGSI Darmstadt (Germany): M. Górska, J. Gerl, S. PietriUniversity of Oslo (Norway): S. SiemOak Ridge (US): N. SchunckATOMKI Debrecen (Hungary): Z. Dombradi, D. Sohler, A. Krasznahorkay, G. Kalinka, J.Gal, J.Molnar INRNE, Bulgarian Academy of Sciences, Sofia (Bulgaria): D. Balabanski,University of Sofia (Bulgaria): S. Lalkovski, K. Gladnishki, P. DetistovNBI Copenhagen (Denmark): B. Herskind, G. SlettenUMCS Lublin (Poland): K. PomorskiHMI Berlin (Germany): H.J. KrappeLBNL, Berkeley, CA (US):P. Fallon, M.-A. Deleplanque, F. Stephens, I-Y. LeeiThemba LABS (RSA): R. Bark, P. Papka, J. LawrieDSM/Dapnia CEA Saclay (France): C. SimenelINFN-LNS, Catania (Italy): D. SantonocitoInstitute of Nuclear Physics, NCSR "Demokritos", Athens (Greece): S. Harissopulos, A. Lagoyannis, T. KonstantinopoulosIstanbul University, Instambul (Turkey): M.N. Erduran, M.Bostan, A. Tutay, M. Yalcinkaya, I. Yigitoglu,E. Ince, E. SahinNigde University, Nigde (Turkey): S. ErturkErciyes University, Kayseri (Turkey): I.. BoztosunAnkara University, Ankara (Turkey): A. Ataç-NybergKocaeli University, Kocaeli (Turkey): T. GürayFlerov Laboratory of Nuclear Reactions, JINR, Dubna, Russia: A. Fomichev, S. Krupko, V. Gorshkov.Uppsala University, (Sweden):H. MachKVI, Groningen, (The Netherlands): M. HarakehINFN and University Milano (Italy): S Brambilla, F. Camera, S. Leoni, O. Wieland. LPSC Grenoble(France): G. Simpson The Weizmann Institute Rehovot (Israel): M. Haas INFN Napoli (Italy): D. Pierroutsakou STFC Daresbury (UK): J. SImpson, J. Strachan, A. Smith, M. Labiche 39 institutions from 16 countries ≈ 100 physicists, engineers and PhD students

  13. PARIS collaboration meetings • Orsay kick-off meeting, January 2007 • Krakow, May 2007 • Caen, November 2007 • York, May 2008 (partially supported by SP2PP@FP7) • Krakow, October 2009 PARIS Management board A. Maj - project spokesman; D. G. Jenkins, J.P. Wieleczko, J.A. Scarpaci - deputies PARIS Steering (Advisory) Committee F. Azaiez (F) -chairman, D. Balabanski (BG), W. Catford (UK), D. Chakrabarty (India), Z. Dombradi (H), S. Courtin (F), J. Gerl (D), D. Jenkins (UK) - deputy chairman, S. Leoni (I), A. Maj (PL), J.A. Scarpaci (F), Ch. Schmidt (F), J.P. Wieleczko (F) • Active working groups • Simulations (O. Stezowski et al.) • PARIS mechanical design scenarios (S. Courtine, D. Jenkins et al.) • Physics cases and theory background (Ch. Schmitt et al.) • Detectors (O. Dorvaux, J. Pouthas et al.) • Financial issues (J.P. Wieleczko et al.) • PARIS in FP7 projects (A. Maj, F. Azaiez et al.)

  14. PHYSICS CASES High efficiency calorimetr for high energy g-rays + • Jacobi shape transitions • 120Cd, 98Mo, 71Zn • (A. Maj, J. Dudek et al.) • b) Studies of shape phase diagrams of hot nuclei – GDR differential methods • 186-193Os, 190-197Pt • (A. Maj, I. Mazumdar et al.) • c) Hot GDR studies in neutron rich nuclei • 128<A<144 • (D.R. Chakrabarty, M. Kmiecik et al.) • d) Isospin mixing at finite temperature • 68Se, 80Zr, 84Mo, 96Cd, 112Ba • (M. Kicińska-Habior et al.) • e) Onset of the multifragmentation and the GDR • 120<A<140, 180<A<200 • (J.P. Wieleczko, D. Santonocito et al.) • f) Reaction dynamicsby means of g-ray measurements • 214-222Ra, 118-226Th, 229-234U • (Ch. Schmitt, O. Dorvaux et al.) • g) Heavy ion radiative capture • 24Mg, 28Si • (S. Courtin, D.G. Jenkins et al.) g-multiplicity filter + RFD or VAMOS or AD NUCLEAR SHAPES g-multiplicity filter g-multiplicity filter + RFD or VAMOS ISOSPIN SYMMETRY g-multiplicity filter INDRA or FAZIA g-multiplicity filter + RFD or VAMOS or CORSET-like REACTION MECHANISMS LISE or RFD

  15. Further Physics cases: Fragmentation studies at RIKEN/GSI-FAIR Coulomb excitation Nuclear Astrophysics (g,p0) with Crystal Ball at MAMI Specifications for the array: Fusion-evaporation (mainly), 5% < v/c < 10% (up to 25% - fragmentation) But also v/c=0 and v/c=40-50% (in case we use it at FAIR) Both shells shall be modular for easy coupling to other detectors (e.g. AGATA, GASPARD, Neutron det., INDRA, FAZIA)

  16. WG Detectors and electronics a) Tests of new LaBr3 cystals: Milan group: Source and 3”x3” crystal Debrecen-Sofia-Orsay-Krakow group: (p,g) reaction and 2”x2” crystal 7Li(p,g)8Be, E(protons)=441 keV FWHM= 80 keV b) Tests of PM tubes and APDs: Strasbourg, GSI, Świerk, Milano

  17. POSSIBLE GEOMETRIES of PARIS SPHERICAL (e.g. same as AGATA modules): + : easy reconstruction, good line shape, compability with other spherical detectors,.. - : Limited to one distance, high cost of a segment,… CUBIC (offering variable geometry): + : adjustable to different distances, compatibility with many detectors, lower cost for a segment, easier mechanical support, - : More complicated reconstruction, worse line shape, …

  18. 3 POSSIBILITIES FOR A „GAMMA-TELESCOPE” ELEMENT E1 Possibility 1. E2 CsI or BaF2 (2”x6”) LaBr3 (2”x2”) PMT PMT t1 t2 Possibility 2. E1 E2 LaBr3 (2”x2”) CsI or BaF2 (2”x6”) APD PMT t1 t2 Possibility 3 – „phoswich”. E1,E2 LaBr3 (2”x2”) CsI(Na) (2”x6”) PMT t1, t2

  19. Phoswich performance Gamma interaction in LaBr3 only Gamma interaction in CsI(Na) only Gamma interaction in both LaBr3 and CsI(Na)

  20. Various cubic designs exist for different inner radii and number of detectors Detailed GEANT4 simulations in progress using realistic geometries and modelling key Physics experiments

  21. Finis

  22. Detector response investigated as function of temperature. Gain changes not so severe. First tests underway at York for SPMPlus coupled to CsI(Tl) crystal

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